From People Magazine...
Just hours after a judge ordered random drug tests for Britney Spears, the singer hit the Los Angeles nightclub scene overnight Tuesday with Avril Lavigne.
Followed by a pack of paparazzi, Spears first was seen at Winston's in West Hollywood with Lavigne and Spears's friend Alli Sims.
The women left around 1 a.m., and Spears was later spotted at Hyde Lounge in West Hollywood until the club closed.
"They kept bringing (Spears) shots and so they were drinking," says a Hyde observer. "She was dancing on the tables trying to be really sexy, even putting a black sock over her head as a hat, and putting on a show for everyone."